Mb556K Muzzle Brake Adapter
Buy It Now: $144.99
Enables attachment of FA556K or FA556-212 suppressors to Colt Commando, M4, M16, or any 5.56mm (.223 cal.) semi-auto, bolt-action, or assault rifle with Mil-Spec 1/2-28 muzzle threads and (due to slight overlap) first .170″ of barrel behind threads clear More . . .
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